BluedioE6 Bluetooth headset uses Bluetooth V3.0 chipset of ISSC, it can transmit numerous data rapidly, may create stable high quality sound. Nowadays, a lot of people may take two mobile phones for personal demand, multipoint paring technology of BluedioE6 can be connected with two mobile phones at the same time. You may not miss BluedioE6 for calling friends or enjoying a business trip. BluedioE6 Technical Specification: Bluetooth Version: V3.0 Frequency Range: 2.4GHz-2.48GHz Transmission Power: Class 2 Operating Voltage: 3.6V Standby Current: ≤0.5mA Operating Distance: Up To 10m (free space) Headset Size:47mm*19mm*27 Music Playtime: Up to 4hrs Charging Time: about 2hrs Standby time: Up to 100hrs